In Samuel Taylor coleridge's "the rime of the ancient mariner," how do readers know that the sailors thought killing the albatross was wrong?

The reader know that the readers know the killing was wrong because of the sadness demonstrated by the mariner. The mariner killed their challenging and saving quest without good reason. His personal fears took over his sense of reason and his connection with nature so that he lost his ability of the sailors to communicate with the animals of the ocean. albatross